C−C Bond Formation Catalyzed Heterogeneously by Nickel-on-Graphite (Ni/C<sub>g</sub>)
作者:Bruce H. Lipshutz、Tom Butler、Elizabeth Swift
DOI:10.1021/ol702453q
日期:2008.3.1
Inexpensive nickel(II) mounted on graphite (Ni/Cg) can be easily activated and used to heterogeneously catalyze cross-couplings involving aryl halides/tosylates with boronic acids, vinylalanes, and vinylzirconocenes. Comparisons are made with the charcoal analogue, Ni/C, and some unusual chemoselectivities between these catalysts have been uncovered.
Efficient and Practical Cross-Coupling of Arenediazonium Tetrafluoroborate Salts with Boronic Acids Catalyzed by Palladium(0)/Barium Carbonate
作者:François-Xavier Felpin、Eric Fouquet
DOI:10.1002/adsc.200800025
日期:2008.4.7
The cross-coupling reaction of arenediazoniumtetrafluoroborate salts with boronic acids catalyzed by the unusual palladium(0)/barium carbonate catalyst is described as an extremely practical and highly efficient alternative to classical homogeneous conditions. Reactions are conducted under mild conditions at room temperature without any base and ligand. The opportunity of preparing unsymmetrical terphenyls
Heterogeneous catalysis with nickel-on-graphite (Ni/C<sub>g</sub>)
作者:Tom A. Butler、Elizabeth C. Swift、Bruce H. Lipshutz
DOI:10.1039/b714600k
日期:——
Impregnation of nickel(II) onto graphite, upon reduction in situ, leads to a reagent that catalyzes both C-H and C-C bond formations between aryl halides, or aryl pseudo-halides, and various organometallics. Cross-couplings, most notably with tosylates, can lead to either reduced aromatics, biaryls, or styrenes as products under the influence of Ni/Cg. The catalyst is inexpensive, non-pyrophoric, and
Suzuki−Miyaura Reactions of Arenediazonium Salts Catalyzed by Pd(0)/C. One-Pot Chemoselective Double Cross-Coupling Reactions
作者:Rachel H. Taylor、François-Xavier Felpin
DOI:10.1021/ol0712733
日期:2007.7.1
Suzuki-Miyaura cross-coupling of arenediazoniumtetrafluoroboratesalts with boronicacid partners catalyzed by Pd(0)/C is described as a practical and efficient alternative to classical homogeneous conditions. Reactions conducted in alcoholic solvents proved to be extremely fast using mild conditions. Additionally, we developed a chemoselective double Suzuki-Miyaura cross-coupling in a single reaction